I also offer an interest-free layaway plan. About Getting This Stamp Expertized. My Professional Service To Sell Your Stamps. Some of My 80,000+ Feedback Comments. #C1 Mint NH Plate Block 1918 6c Jenny" is in sale since Thursday, November 14, 2019.This item is in the category "Stamps\United States\Back of Book\Air Mail". The seller is "gsquared7" and is located in Ankeny, Iowa. This item can be shipped worldwide.